package com.atguigu.gulimall.seckill.scheduled;

import com.atguigu.gulimall.seckill.service.SeckillService;
import lombok.extern.slf4j.Slf4j;
import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;

import java.util.concurrent.TimeUnit;

/**
 * 秒杀商品的定时上架任务:
 *      每天晚上3点: 上架最近三天需要秒杀的商品
 *      当天 00:00:00 - 23:59:59
 *      明天 00:00:00 - 23:59:59
 *      后天 00:00:00 - 23:59:59
 *
 * @Author: WackyBoy
 * @Date: 2021/7/17 21:14
 */
@Service
@Slf4j
public class SeckillSkuScheduled {

    @Autowired
    SeckillService seckillService;

    @Autowired
    RedissonClient redissonClient;

    private final String upload_lock = "seckill:upload:lock";

    // TODO: 幂等性处理
    @Scheduled(cron = "0 * * * * ?")
    public void uploadSeckillSkuLatest3Days() {
        // 1. 重复上架无需处理
        log.info("上架秒杀的商品信息");
        // 分布式锁, 锁执行完成, 状态已经更新完成, 释放锁以后, 其他人获取到就会拿到最新的状态
        // TODO(或者使用分布式定时任务 xxl-job)
        RLock lock = redissonClient.getLock(upload_lock);
        lock.lock(10, TimeUnit.SECONDS);
        try {
            seckillService.uploadSeckillSkuLatest3Days();
        } finally {
            lock.unlock();
        }
    }

}



















